Turn signal problem solved
Thread Starter
Senior Member
Joined: Aug 2002
Posts: 490
Likes: 1
From: Canada
05 CLK 500 cab
Turn signal problem solved
My 03 coupe suddenly developed a problem with its turn signals.
Symptoms: Left indicator would stop flashing after three blinks, but only about half the time. Right indicator would sometimes turn on the left turn signal (not nice!) or would other times cause the signals to flip between their left and right turn states (a few lefts, then a few rights, then…). A good incentive to go straight, one could say.
Solution: Dealer installed updated front turn signal bulb sockets. I didn’t get a copy of the work order, so no part numbers. As improbable as it sounds, this appears to have fixed the problem. There has been no recurrence in a week.
Edit: The combination turn signal switch was also replaced (see below).
Two visits (one to diagnose, one to install parts). Two good loaners, an 03 C240 and an 03 ML350, demonstrated to me once again how nice a car the coupe is. Free car washes, but not a donut in sight. I can see I might have to move to SoCal.
Dealer had an S600 twin turbo in the showroom. Awesome sound and finish: stitched leather dashboard top, suede headliner, reclining rear seat, a REST system that blows air much faster than my car does, and lots of wood.
Symptoms: Left indicator would stop flashing after three blinks, but only about half the time. Right indicator would sometimes turn on the left turn signal (not nice!) or would other times cause the signals to flip between their left and right turn states (a few lefts, then a few rights, then…). A good incentive to go straight, one could say.
Solution: Dealer installed updated front turn signal bulb sockets. I didn’t get a copy of the work order, so no part numbers. As improbable as it sounds, this appears to have fixed the problem. There has been no recurrence in a week.
Edit: The combination turn signal switch was also replaced (see below).
Two visits (one to diagnose, one to install parts). Two good loaners, an 03 C240 and an 03 ML350, demonstrated to me once again how nice a car the coupe is. Free car washes, but not a donut in sight. I can see I might have to move to SoCal.
Dealer had an S600 twin turbo in the showroom. Awesome sound and finish: stitched leather dashboard top, suede headliner, reclining rear seat, a REST system that blows air much faster than my car does, and lots of wood.
Last edited by lars; Mar 26, 2003 at 02:34 PM.
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My 2003 C320 Touring had blinker problems as well. Sometimes the blinker would illuminate continuously instead of blinking...also it would vary the blinking speed and sometimes it just didn't work. But crossing left and right is something new to me, sounds comical from my end but I can see that being a huge problem in traffic!
Thread Starter
Senior Member
Joined: Aug 2002
Posts: 490
Likes: 1
From: Canada
05 CLK 500 cab
Originally posted by antonio
can you please post the new part number for the updated turn bulb sockets. thanks.
can you please post the new part number for the updated turn bulb sockets. thanks.
203-826-02-82 lamp socket (2)
000-545-78-80 gasket (2)
000-545-23-10 combination switch
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Joined: Dec 2001
Posts: 114
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From: Washington D.C. area
190 2.3 and C320
I just had a turn signal problem; the left front headlamp turn signal went out and I got a warning message on my dash display screen. The turn signal blinker also blinked fast. I still had turn signals at the rear of the car at at the front driver's side mirror, so I felt the car was safe to drive. I took the car into the dealer service and told my service representative that the "turn signal bulb" was out and expressed puzzlement that a bulb could go bad on a car barely 14 months old. He explained that it was not the bulb at all, but a defective wiring harness that caused the bulb to malfunction and that a lot of cars were coming into the dealer with that problem. The dealer replaced the wiring harnesses on both the right and front headlamps.
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Joined: Sep 2002
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From: Ohio
2010 C300 4matic
Originally posted by aborwick
I just had a turn signal problem; the left front headlamp turn signal went out and I got a warning message on my dash display screen. The turn signal blinker also blinked fast.
I just had a turn signal problem; the left front headlamp turn signal went out and I got a warning message on my dash display screen. The turn signal blinker also blinked fast.
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Thread Starter
Senior Member
Joined: Aug 2002
Posts: 490
Likes: 1
From: Canada
05 CLK 500 cab
Originally posted by Matt230K
The reason that the turn signal blinks fast is a built-in feature that all cars have (or at least most). It is there to let you know that you have a turn signal bulb out.
The reason that the turn signal blinks fast is a built-in feature that all cars have (or at least most). It is there to let you know that you have a turn signal bulb out.
